My rooster has been very rough with my laying hen. She looks like she has been beaten on her head. She is black and swollen on the side of her head where I think he grabs her. Also you can see the back of her head is swollen. I can't see any broken skin. I've got her isolated in the pen today to give her a break. What else should I do? I'm trying to get rid of the roos. I have two and one other hen that they don't bother as much.